Most Important Questions and Answers on Biology

Questions

96 The prokaryotic genetic system contains

A DNA and histones

B Either DNA or histones

C DNA but histones

D Neither DNA nor histones

Answer: Option [C]

97 'One gene one enzyme theory' was given by

A Beadle and Tautum

B Watson and Crick

C Beadle and Morgany

D Morgan and Muller

Answer: Option [A]

98 In an organism that has 44 chromosomes i.e. 22 homologous pairs; at the end of first meiotic division the daughter cell will have

A 44 chromosomes

B 11 chromosomes

C 22 chromosomes

D All the above

Answer: Option [C]

99 The somatic chromosome complement in all human being is

A 21 pairs of autosomes and one pair of heterosomes

B 23 pairs of autosomes and one pair of heterosomes

C 22 pairs of autosomes and one pair of heterosomes

D 22 pairs of autosomes and one pair of XY chromosomes

Answer: Option [C]

100 Depending upon size and centromere position the 46 chromosomes hhave been divided into a number of groups

A 6

B 5

C 7

D 10

Answer: Option [C]

NCERT Class 12 Biology Solved Multiple Choice Questions